Query : 2015A&A...584A..12M

2015A&A...584A..12M - Astronomy and Astrophysics, volume 584A, 12-12 (2015/12-1)

Outburst evolution, historic light curve and a flash-ionized nebula around the WZ Sge-type object PNV J03093063+2638031.


Abstract (from CDS):

We have monitored the 2014 superoutburst of the WZ Sge-type transient PNV J03093063+2638031 for more than four months, from V=11.0 maximum brightness down to V=18.4mag, close to quiescence value, by obtaining B VRCIC photometry and low resolution fluxed spectroscopy. The evolution was normal and no late-time ``echo'' outbursts were observed. The absolute integrated flux of emission lines kept declining along the superoutburst, and their increasing contrast with the underlying continuum was simply the result of the faster decline of the continuum compared to the emission lines. Inspection of historical Harvard plates covering the 1899-1981 period did not reveal previous outbursts, neither ``normal'' nor ``super''. We discovered an extended emission nebula (radius ∼1-arcmin) around PNV J03093063+2638031, that became visible for a few months as the result of photo-ionization from the superoutburst of the central star. The nebula is not present on Palomar I and II sky survey images and it quickly disappeared when the outburst was over. From the rate at wich the ionization front swept through the nebula, we derive a distance of ∼120pc to the system. The nebula is density bounded with an outer radius of 0.03pc, and the absolute magnitude of the central star in quiescence is MV∼14.2mag. The electron density in the nebula is estimated to be 105cm–3 from the observed recombination time scale. Given the considerable substructures seen across the nebula, a low filling factor is inferred. Similar nebulae have not been reported for other WZ Sge objects and the challenges posed to models are considered.

Abstract Copyright:

Journal keyword(s): novae, cataclysmic variables

VizieR on-line data: <Available at CDS (J/A+A/584/A12): table4.dat 20141030.dat 20141102.dat 20141123.dat 20141223.dat>

Simbad objects: 5

goto Full paper

goto View the references in ADS

Number of rows : 5
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 2MASS J03092963+2638367 * 03 09 29.6304506784 +26 38 36.861788220           ~ 1 0
2 CRTS CSS141117 J030930+263804 CV* 03 09 29.7506818296 +26 38 04.343722764   19.2   18.1   ~ 11 0
3 2MASS J03093473+2638101 * 03 09 34.7342219976 +26 38 10.031968680           ~ 1 0
4 V* EG Cnc CV* 08 43 03.9863206560 +27 51 49.693595508           DAe 176 0
5 V* WZ Sge CV* 20 07 36.5037622512 +17 42 14.733254952   15.30 15.20     DAepv 931 0

To bookmark this query, right click on this link: simbad:objects in 2015A&A...584A..12M and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact